US12224519B2 - Electrical plug connector - Google Patents

Abstract

An electrical plug connector, in particular built-in plug connector, includes a housing with a connecting flange having through holes for feeding through fasteners; a flange plate with mounting bores for connecting to a device wall; a control panel, or similar; and a seal inserted therebetween. The outer edge of the flange plate is bent towards the housing and overlaps the outer edge of the connecting flange. The seal protrudes with a circumferential sealing lip into the insertion opening and has an edge bent towards the housing, which edge overlaps circumferential edge of the connecting flange and which, itself, is overlapped by the outer edge of the flange plate. In the assembled state, the circumferential edge of the flange plate extends at maximum to the height of the rear side of the connecting flange and the edge of the seal is higher than the rear surface of the connecting flange.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is the National Stage of PCT/EP2020/025426 filed on Sep. 22, 2020, which claims priority under 35 U.S.C. § 119 of Austrian Application No. A50816/2019 filed on Sep. 24, 2019, the disclosure of which is incorporated by reference. The international application under PCT article 21 (2) was not published in English.

The invention relates to an electrical plug connector, in particular a built-in plug connector, as well as a seal for such a plug connector.

Built-in plug connectors, also referred to as chassis sockets, are installed in the housings of electrical devices, in control panels, or similar arrangements, in order to connect these devices to electric lines. These lines carry, on at least one end, a cable plug connector in a design complementary to the built-in plug connector and can be electrically connected thereto and also be locked mechanically against undesired release of the connection.

The built-in plug connector typically comprises a housing with an insertion opening for the complementary plug connector, wherein a projecting connecting flange protrudes on the insertion-side end of the housing, which connecting flange has through holes for feeding through fastening means. Moreover, a flange plate is provided on the insertion side, having an insertion opening for the complementary plug connector and having mounting bores for connecting to a device wall, a control panel, or the like.

CN 204516967 U discloses a built-in plug connector, in which an essentially flat sealing plate is inserted between the flange plate and the connecting flange on the housing and seals the connection off these two components. If a sealing of the entire built-in plug connector against a device wall, in which it is inserted, a control panel, or the like is desired, an additional seal must be provided between the built-in plug connector and the device wall. This makes the installation more complex and slower and requires an additional component.

A seal for sealing the of at least the flange plate of a built-in plug connector is known and is used, for example, in the SE8FD-TOP installation kit. This seal is designed as an essentially flat sealing plate and has a central cutout at the location of the insertion opening of the built-in plug connector. By means of the positioning between the device wall, control panel, or the like and the flange plate with the insertion opening for the complementary plug connector, an intrusion of dust, moisture, etc. into the interior of the device or the control panel is prevented. Finally, at least one fastening means, typically a screw, serves to fasten the housing, flange plate, and seal on the device wall, control panel, or the like.

An electrical plug connector, in which the outer edge of the flange plate is bent up towards the housing and overlaps the outer edge of the connecting flange, is disclosed in US 2007/0141886 A1. The seal of this plug connector has a circumferential sealing lip, which protrudes radially into the insertion opening and the seal has an edge bent up towards the housing, which edge overlaps the outer circumferential edge of the connecting flange and which itself is overlapped by the outer edge of the flange plate. In the assembled state, the circumferential edge of the flange plate extends at maximum to the height of the rear side of the flange plate of the housing, and the edge of the seal protruding towards the housing is higher than the rear surface of the connecting flange over the entire circumference of said connecting flange.

The object of the present invention was to overcome the shortcomings of the prior art and to create a built-in plug connector as comprehensively sealed as possible, which can be mounted by the end user without additional components, in a simple and swift manner with common tools.

This object is achieved by means of a device according to the invention. Further features are discussed below.

The device according to the invention is characterized in that at the locations of the mounting bores, sealing grommets are integrally formed onto the seal, which protrude upwards towards the flange plate. In the assembled state, the sealing grommets extend inside the mounting bores of the flange plate, which preferably have socket-shaped extensions in the direction towards the connecting flange of the housing. In this regard, their outer diameter preferably corresponds to the inner diameter of the mounting bores and/or of the socket-shaped extensions, wherein the sealing grommets end in the mounting bore above the lower edge of the accommodating region for the head of the fastening means. Thereby, on the one hand, a further improvement of the sealing effect can be achieved in that the intrusion of moisture, dirt, or dust via the mounting bores is prevented, while the fastening means, in particular the screw heads, still exhibit a hard stop on the flange plate, which can be noticed well.

A further optimization of the sealing effect is given if the inner diameter of the sealing grommets corresponds at a minimum to the outer diameter of the fastening means and thus, all surfaces abut one another in a sealing manner.

Preferably, the inner side of the outer edge, which is bent up towards the housing, of the flange plate is slanted outwardly, and the outer side of the circumferential edge of the seal is also slanted outwardly, preferably in a complementary manner thereto. When plugging together and/or when fastening to the device wall or the control panel by means of the provided fastening means, the edge of the seal is slightly squeezed thereby and is pressed towards the device wall or the surface of control panel, which allows achieving a particularly good sealing effect.

An alternative embodiment of a plug connector according to the invention provides that, in the assembled state, the circumferential edge of the flange plate ends before the height of the rear side of the flange plate of the housing, and a circumferential sealing edge projecting outwards covers at least a part of the thickness of the edge, which is bent up towards the housing, of the flange plate. Thereby, the shearing effect of a slanted inner side of the flange plate is avoided, and the sealing effect is effected by a force acting perpendicularly onto the edge of the seal.

According to a preferred embodiment of the invention, the plug connector is additionally characterized in that the flange plate has retaining pins protruding towards the housing, and the connecting flange has corresponding retaining bores, into which the ends of the retaining pins can be inserted. Preferably, the retaining bores are bounded by rings rising above the connecting flange, and the seal overlaps said rings with centrally open domes abutting thereon. Thereby, the flange plate and the housing are connected to the seal inserted in between them sufficiently well for preventing them from falling apart and to be able to handle the plug connector as a joint component. Moreover, in the case of retaining bores, which completely penetrate the connecting flange, the retaining pins may be provided for butting on the front side of the device housing, the connecting flange, or the like and thus, have a spacer effect, in order to limit the influence on the seal and thus prevent damage to it.

In order to ensure the sealing effect for the retaining bores, as well, preferably, the central opening of the domes has a slightly smaller diameter than the passage opening and/or the outer diameter of the retaining pins. Thus, a sealed feed-through of the retaining pins is ensured, as well as a good cohesion due to the friction between the seal and the retaining pin.

Preferably, the plug connector is designed such that the flange plate has a circumferential groove surrounding the insertion opening, in which groove a ridge is accommodated, which surrounds the sealing lip for the insertion opening radially outside and rises above the surface of the seal. In addition to the optimal centering of the seal and the flange plate relative to one another, this ridge also acts as an additional sealing ridge and thus increases the sealing effect.

In many cases of plug connections, it is desired that an inadvertent release of the connection is prevented. For this purpose, locking arrangements are present between the complementary plug connectors, which locking arrangements, however, have to be unlocked by actuating an actuating element to effect the desired release of the plug connection. Therefore, a preferred embodiment of a plug connector according to the invention provides that in the flange plate, a through hole extends radially outwards from the insertion opening, through which through hole, in the assembled state, an actuating element for a locking mechanism protrudes from the housing outwards towards the front side of the flange plate. In order to also seal this extension of the insertion opening in an optimal manner, a dome rising above the surface of the seal, radially connecting to the insertion opening extends through the through hole outwards towards the front side of the flange plate. In this regard, the actuating element is covered by the dome. For achieving the initially mentioned object, particularly a seal for an electrical plug connector, in particular a built-in plug connector, especially a plug connector according to one of the preceding paragraphs, has been devised for sealing it optimally against a device wall, control panel, or the like. This seal has a central cutout at the location of the insertion opening of the plug connector and recesses at the locations of the mounting bores for the plug connector.

According to the invention, it is particularly characterized in that sealing grommets rising above the front surface of the seal and having central feed-throughs for the fastening means are arranged at locations for feeding through fastening means. Thereby, the built-in plug connector can be mounted so as to be optimally sealed even at the locations of the fastening means.

In this regard, the sealing structure preferably comprises a circumferential sealing ridge, which enables a secure, linear sealing. In this regard, the outside of the circumferential edge of the seal is preferably slanted outwardly, so as to transform only a part of the fastening force acting perpendicularly onto the seal into contact pressure and to thereby limit the same. As an alternative embodiment, a seal is provided, in which the sealing structure is a circumferential sealing edge radially projecting outwards. Thereby, an undesired shearing effect to the outer edge of the seal can be prevented, and the sealing edge can be pressed perpendicularly on the device wall, control panel, or the like.

A further advantageous embodiment of a seal according to the invention is characterized in that domes rising above the front surface of the seal and having central feed-throughs for the spacer pins are arranged at locations for feeding through retaining pins. Such a seal is optimally suited for use in built-in plug connectors, whose flange plate and housing can be connected at least provisionally by means of cooperating retaining pins and retaining bores in these components.

For built-in plug connectors with locking arrangements and actuating elements for unlocking them, a seal, which according to the invention has a dome rising above the front surface of the seal radially connecting to the insertion opening, is optimally suited. Under said dome, the actuating element of the locking arrangement can be accommodated. In this regard, this dome is preferably formed in one piece with the seal.

The good centering of the seal against preferably the flange plate is ensured by means of a ridge rising above the front surface of the seal and surrounding the sealing lip for the insertion opening radially outside. This ridge is also an additional sealing edge and additionally improves the sealing effect.

In order to keep the built-in plug connector sealed even if the complementary plug connector is not plugged in, preferably, at least one radially protruding connecting strip is integrally formed onto the seal, on the outer end of which a sealing plug is fastened, the outer diameter of which is slightly greater than the inner diameter of the sealing lip of the insertion opening. For the sake of material savings, this sealing plug is preferably designed so as to be recessed in the shape of a pot.

Preferably, a full-surface gripping lug protrudes on the side of the sealing plug opposite the connecting strip, which significantly facilitates handling. Preferably, this gripping lug is also designed to be pot-shaped and overlaps and protects the dome in the plugged-in state of the sealing plug, which dome covers and seals the actuating element of the locking arrangement.

For the purpose of better understanding of the invention, it will be elucidated in more detail by means of the figures below.

These show in a respectively very simplified schematic representation:

FIG.1 an oblique view from the upper front of a first embodiment of a built-in plug connector according to the invention;

FIG.2 a view rotated by 180 degrees;

FIG.3 an exploded oblique view from the upper front;

FIG.4 a cross-section exactly in the central plane of the built-in plug connector ofFIGS.1 to3;

FIG.5 a cross-section in a parallel plane, which contains the central axes of the fastening bores and of the retaining pins;

FIG.6 a detailed cross-section in the region of the fastening bores with an inserted fastening screw;

FIG.7 a detailed cross-section in the region of the fastening bores with an inserted and tightened fastening screw;

FIG.8 an advantageous embodiment of a seal for a built-in plug connector to a greater scale;

FIG.9 an oblique view from the upper front of a further embodiment of a built-in plug connector according to the invention;

FIG.10 a cross-section exactly in the central plane of the built-in plug connector ofFIG.7; and

FIG.11 a cross-section through a further embodiment of a built-in plug connector, with a sealing edge chamfered in a stepped manner.

First of all, it is to be noted that in the different embodiments described, equal parts are provided with equal reference numbers and/or equal component designations, where the disclosures contained in the entire description may be analogously transferred to equal parts with equal reference numbers and/or equal component designations. Moreover, the specifications of location, such as at the top, at the bottom, at the side, chosen in the description refer to the directly described and depicted figure and in case of a change of position, these specifications of location are to be analogously transferred to the new position.

FIG.1 shows by way of example a first embodiment of a built-in plug connector according to the invention in the form of a chassis socket for a data plug, in particular an RJ45 data plug, in a perspective view. Of course, the structure according to the invention can also be transferred to other types of built-in plug connector, which is explained by way of example with the further exemplary embodiment ofFIGS.9 and10, which show an XLR chassis socket.

In the following description, equal reference numbers and/or component designations are used for equal parts. In order to avoid unnecessary repetitions, it is pointed to/reference is made to detailed description already given.

The exemplary embodiments show possible embodiment variants, and it should be noted in this respect that the invention is not restricted to these particular illustrated embodiment variants of it, but that rather also various combinations of the individual embodiment variants are possible and that this possibility of variation owing to the technical teaching provided by the present invention lies within the ability of the person skilled in the art in this technical field. The electrical built-in plug connector ofFIG.1, shown in detail in an exploded view inFIG.3, comprises ahousing1 with aninsertion opening2 for a complementary plug connector (not shown). On the insertion-side end, on the front side of thehousing1, a projecting connectingflange3 is provided, which protrudes in a preferably orthogonal manner from thehousing1 and preferably over its entire circumference. The connectingflange3 also has passage openings or partially open throughholes4, through which fastening means5, typically fastening screws, rivets, or the like, for the built-in plug connector can be fed, in order to fasten it on a device wall G, a control panel, or similar elements (in this regard, seeFIG.6). The throughholes4 are preferably positioned in two corners of the connectingflange3, which is rectangular here, opposite one another with respect to a central axis of theinsertion opening2. Of course, other silhouettes of the connectingflanges3 are also possible, for example a circular outline, a polygonal chain, or the like. It is also possible forpassage openings4 to be present in all corners of the connectingflange3.

At other points of the connectingflange3, there are retainingbores6, which are bounded byrings7 rising above the front side of the connectingflange3. Typically, two retainingbores6 are positioned in two corners of the connectingflange3 opposite one another with respect to a central axis of theinsertion opening2. In these retainingbores6, complementary retaining elements of other components can be inserted. These retaining bores6 are preferably provided in the center ofrings7 rising over the connectingflange3.

Finally, in or on thehousing1, alocking arrangement8,9 is also positioned, the at least onelocking element9 of which may also be unlocked by means of anactuating element8. Thisactuating element8 protrudes beyond the insertion-side end of thehousing1 towards the front, so a user can reach it well.

In the assembled state of the built-in plug connector, aflange plate10 on the insertion side is located opposite the front side of the connectingflange3 of thehousing1. Thisflange plate10 has an insertion opening11 for the complementary plug connector in a coaxial arrangement relative to theinsertion opening2 of thehousing1. Moreover, mountingbores12 are formed in theflange plate10, positioned coaxially to the throughholes4 in the connectingflange3 and designed for feeding through fastening means5 for the built-in plug connector for connecting to a device wall, a control panel, or the like. At that location at which theactuating element8 is arranged, a recess13 directed radially outwards extends from the insertion opening11, through which recess13 theactuating element8 can protrude towards the front side of theflange plate10.

Theouter edge14 of theflange plate10 is bent up towards thehousing1 and overlaps—this can be seen better in the rear view of the built-in plug connector inFIG.2 and in the cross-section ofFIG.4—the outer edge of the connectingflange3. On the rear side of theflange plate10, the mounting bores12 preferably have socket-shapedextensions15 in the direction towards the connectingflange3 and preferably extend up to the contact with this connectingflange3.

At positions which correspond to the retaining bores6 of the connectingflange3, theflange plate10 has retainingpins16 protruding towards thehousing1. Their ends are designed for insertion and fixation in the retaining bores6 of the connectingflange3. They may possibly also be inserted into the retaining bores6 completely and until contacting the housing wall, control panel, or the like, and act as a spacer.

A preferably plate-shapedseal17 for sealing against the device wall G, the control panel, or the like is inserted directly between theflange plate10 and the connectingflange3 of thehousing1 and held clamped between said components. Thisseal17 has acentral cutout30, which corresponds at least to theinsertion opening2 in size and which is arranged coaxially thereto. Thiscentral cutout30 is bounded by acircumferential sealing lip18, which protrudes radially into theinsertion opening2 and seals the annular gab of theinsertion opening2 when the complementary plug connector is plugged in.

Theedge19 of theseal17 is bent up towards thehousing1 in the region of theflange plate10 and the connectingflange3 and overlaps the outer circumferential edge of the connectingflange3 with said bent-upedge strip19. On the other hand, the bent-upedge19 of theseal17 itself is overlapped by the bent-upouter edge14 of theflange plate10. The relative thicknesses of theseal17 and connecting flange as well as the height of theouter edge14 are selected such that, in the assembled state, thecircumferential edge14 of theflange plate10 extends at maximum to the height of the rear side of the connectingflange3 of thehousing1, and theedge19 of theseal17 protruding towards thehousing1 is higher than the rear surface of the connectingflange3 over the entire circumference of said connectingflange3 and is ultimately pressed against the wall of the device housing, the control panel, or the like and fulfills the sealing function when the built-in plug connector is installed.

At the location of the mounting bores12 of the flange plate and/or the throughholes4 of the connectingflange3,passage openings20 are formed in theseal17, as well.

As can be seen well inFIGS.6 and7, in a preferred embodiment of the invention, the inner side of the bent-upedge14 of theflange plate10 is designed so as to be slanted outwardly. Theseal17, as well, or rather its bent-upedge19, is also designed to be slanted outwardly, preferably so as to complement the slanting of theflange plate10. As shown inFIG.7, when tightening thefastening screw5 during mounting of the built-in plug connector, theedge19 of theseal17 is pressed on the device wall G, the control panel, or the like, wherein the seal, however, is preferably completely covered and protected by theflange plate10. As an alternative thereto, a construction according toFIG.11 could also be selected, in which, in the assembled state, thecircumferential edge14 of theflange plate10 ends before the height of the rear side of the connectingflange3 of thehousing1, and acircumferential sealing edge31 projecting outwards covers at least a part of the thickness of theedge14, which is bent up towards thehousing1, of theflange plate10.

As is also clearly shown inFIGS.6 to8, according to a preferred embodiment, theseal17 has sealinggrommets21 integrally formed onto theseal17 at the locations of the mounting bores12, which sealinggrommets21 protrude upwards towards the rear side of theflange plate10. These sealinggrommets21 extend, in the assembled state, inside the mounting bores12 of theflange plate10, in particular also inside their socket-shapedextension15, wherein their outer diameter preferably corresponds to the inner diameter of the mounting bores12 and/or theextension15. Here, the inner diameter is determined in that section, in which the shaft of the fastening means, that is preferably the threaded section of afastening screw5, is accommodated in the mounting bore12.

In an unloaded state, the sealinggrommets21 end—as shown inFIG.6—slightly above the lower edge of the accommodating region for the head of thefastening screw5 in the mounting bore12. After tightening thefastening screw5, the material of the sealinggrommets21 is squeezed between thefastening screw5, which is tightened until stop on the inner side of the mounting bore12 of theflange plate10, and theflange plate10 and thereby seals the region of the screw head.

The inner diameter of the sealinggrommets21 preferably is to be greater than the outer diameter of the fastening means, in particular the fastening screws5, wherein this outer diameter is the nominal diameter of the thread. At minimum, the inner diameter of the passage opening20 of the sealinggrommets21 is to correspond, in the unloaded state, to the outer diameter of the fastening screws5, as shown inFIG.6. However, if thefastening screw5 is tightened completely, the sealinggrommet5 is compressed, and the material of the sealinggrommet21 clings to the inner wall of the mounting bore12 and enters between the threads of thefastening screw5, whereby the state shown inFIG.7 comes about. In combination with the positive locking connection in the region of the screw head, this results an optimal sealing effect across the entire height of the sealinggrommet21.

At the positions of the retaining bores6 on the connectingflange3, theseal17 preferably hasdomes22 rising above its surface, which domes22, in the assembled state of the built-in plug connector, overlap therings7 in an abutting manner. For feeding through the retaining pins16 of theflange plate10, thedomes22 havecentral openings23, the diameter of which is preferably slightly smaller than the diameter of the retainingbore6 and/or of the section of the retainingpin16 to be inserted into the retainingbore6.

As a further structure rising above the surface of theseal17, aridge24 or protuberance is present, which surrounds the sealinglip18 for theinsertion opening2 and thecentral cutout30 radially outside. In the assembled state ofseal17 andflange plate10, thisridge24 is received in a correspondinggroove25, which coaxially surrounds the insertion opening11.

In the region, in which, in the assembled state, theactuating element8 protrudes through theflange plate10, theridge24 terminates in adome26, which also rising above the surface of theseal17 and, in its height, even further over the height of theridge24. Thisdome26 advantageously formed integrally with theseal17 also protrudes beyond the front side of theflange plate10 and allows the user to actuate theactuating element8 and thus the release of the locking of the complementary plug connector plugged into the built-in plug connector, which plug connector is held in theinsertion opening2 of thehousing1 by the lockingarrangement9 until then.

In addition to the sealing of theinsertion opening2 by means of the sealinglip18 of theseal17 when the complementary plug connector is plugged in, a possibility for sealing in an unplugged state was also desired. For this purpose, at least one radially protruding connecting strip is integrally formed onto theseal17, projecting out from under theedge region14 of theflange plate10 bent towards thehousing1. Preferably, — as shown in the figures—two such connectingstrips27 are integrally formed onto theseal17 in an approximately parallel or slightly V-shaped arrangement. At the outer end of these connectingstrips27, a sealingplug28 is fastened, the outer diameter of which corresponds at maximum to the inner diameter of theinsertion openings2,11 and which preferably is slightly greater than the inner diameter of the sealinglip18 of theseal17 sealing theinsertion opening2. Preferably, the sealingplug28 has a pot-shaped design.

For easier handling of the sealingplug28, a full-surface gripping lug29 protrudes on the side of the sealingplug28 opposite the connectingstrip27. Preferably, this grippinglug29 also has an open pot-shaped design, wherein its opening is oriented in the same direction as thedome26 sealing theactuating element8 and is positioned in one line with thisdome26 and the central axis of theinsertion opening2. When folding the connectingstrips27 for inserting the sealingplug28 into theinsertion opening2, this results that thedome26 is simultaneously covered and protected by the pot-shapedgripping lug29.

FIG.11 shows a cross-section through a further embodiment of a built-in plug connector, with a sealing edge chamfered in a stepped manner.

By pressing the built-in plug connector onto the housing wall, the control panel, or the like until the edge of the flange plate abuts on said wall, the edge of the seal that is higher than the connecting flange in the rear is pressed tightly onto the wall and is squeezed so as to fill the volume between the connecting flange and the edge of the flange plate. Here, the seal is located between the connecting flange and the flange plate so as to be protected against damage before, during, and after installation. The insertion opening is sealed by the circumferential sealing lip when the complementary plug is plugged in, while the sealing against the housing of the device or the control panel is ensured by the bent-up edge of the seal protected by the flange plate. The components flange plate, seal, and housing with connecting flange may be plugged together at the factory and may be used by the end user as a component that can be handled as one joint part.

The scope of protection is determined by the claims. Nevertheless, the description and drawings are to be used for construing the claims. Individual features or feature combinations from the different exemplary embodiments shown and described may represent independent inventive solutions. The object underlying the independent inventive solutions may be gathered from the description.

Finally, as a matter of form, it should be noted that for ease of understanding of the structure, elements are partially not depicted to scale and/or are enlarged and/or are reduced in size.

List ofreference numbers

	1	Housing
	2	Insertion opening
	3	Connecting flange
	4	Throughhole
	5	Fastening screw
	6	Retaining bore
	7	Ring
	8	Actuating element
	9	Locking element
	10	Flange plate
	11	Insertion opening
	12	Mounting bore
	13	Recess
	14	Bent-upedge
	15	Socket-shapedextension
	16	Retaining pin
	17	Seal
	18	Sealing lip
	19	Bent-upedge
	20	Passage opening
	21	Sealing grommet
	22	Dome
	23	Central opening
	24	Ridge
	25	Groove
	26	Dome
	27	Connectingstrip
	28	Closing plug
	29	Gripping lug
	30	Central cutout
	31	Sealing edge
	32
	33
	34
	35
	36
	37
	38
	39
	40
	41
	42
	43
	44
	45
	46
	47
	48
	49
	50
	51
	52
	53
	54
	55
	56
	57
	58
	59
	60
	61
	62
	63
	64
	65
	G	Device wall

Claims (16)

The invention claimed is:

1. An electrical plug connector, comprising:

a housing (1) with an insertion opening (2) for a complementary plug connector, wherein a projecting connecting flange (3) protrudes on an insertion-side end of the housing (1), which connecting flange (3) has through holes (4) for feeding through a fastener (5);

an insertion-side flange plate (10) with an insertion opening (11) for the complementary plug connector and having mounting bores (12) for connecting to a device wall (G);

a control panel; and

a seal (17) with a central cutout (30) in a region of the insertion opening (2), inserted between the connecting flange (3) and the flange plate (10), wherein the seal (17) with a circumferential sealing lip (18) protrudes radially into the insertion opening (2), and the fastener (5) for fastening the housing (1), the flange plate (10), and the seal (17) to the device wall (G) or the control panel;

wherein an outer edge (14) of the flange plate (10) is bent up towards the housing (1) and overlaps an outer edge of the connecting flange (3), and on a rear side, the seal (17) has an edge (19) bent up towards the housing (1), which edge (19) rises above a rear surface of the seal (17) and overlaps an outer circumferential edge of the connecting flange (3) and which, itself, is overlapped by the outer edge (14) of the flange plate (10);

wherein, in an assembled state, a circumferential edge (14) of the flange plate (10) extends at maximum to a height of the rear side of the connecting flange (3) of the housing (1), and the edge (19) of the seal (17) protruding towards the housing (1) is higher than a rear surface of the connecting flange (3) over an entire circumference of the connecting flange (3) and forms a sealing structure or is provided with a sealing structure;

wherein at locations of the mounting bores (12), sealing grommets (21) are integrally formed onto the seal (17), which protrude upwards towards the flange plate (10);

wherein, in the assembled state, the sealing grommets (21) extend inside the mounting bores (12) of the flange plate (10);

wherein an outer diameter of the sealing grommets (21) corresponds to an inner diameter of the mounting bore (12); and

wherein the sealing grommets (21) end above the lower edge of an accommodating region for a head of the fastener (5) in the mounting bore (12).

2. The electrical plug connector according toclaim 1, wherein an inner side of the outer edge (14), which is bent up towards the housing (1), of the flange plate (10) is slanted outwardly, and the outer side of the circumferential edge (19) of the seal (17) is also slanted outwardly, in a complementary manner thereto.

3. The electrical plug connector according toclaim 1, wherein in the assembled state, the circumferential edge (14) of the flange plate (10) ends before the height of the rear side of the connecting flange (3) of the housing (1), and a circumferential sealing edge (31) projecting outwards covers at least a part of a thickness of the circumferential edge (14), which is bent up towards the housing (1), of the flange plate (10).

4. The electrical plug connector according toclaim 1, wherein an inner diameter of the sealing grommets (21) corresponds at a minimum to the outer diameter of the fastener (5).

5. The electrical plug connector according toclaim 1,

wherein the flange plate (10) has retaining pins (16) protruding towards the housing (1);

wherein the connecting flange (3) has corresponding retaining bores (6), into which ends of the retaining pins (16) can be inserted; and

wherein the retaining bores (6) extend in a center of rings (7) rising above the connecting flange (3), and the seal (17) overlaps the rings (7) with centrally open domes (22) abutting thereon.

6. The electrical plug connector according toclaim 5, wherein the central opening (23) of the domes (22) has a slightly smaller diameter than the retaining bore (6) and/or the outer diameter of the retaining pins (16).

7. The electrical plug connector according toclaim 1, wherein the flange plate (10) has a circumferential groove (25) surrounding the insertion opening (11), in which groove (25) a ridge (24) is accommodated, which surrounds the sealing lip (18) for the insertion opening (2) radially outside and rises above a surface of the seal (17).

8. The electrical plug connector according toclaim 1,

wherein in the flange plate (10), a recess (13) extends radially outwards from the insertion opening (11), through which recess (13), in the assembled state, an actuating element (8) for a locking mechanism (8,9) protrudes from the housing (1) outwards towards a front side of the flange plate (3); and

wherein a dome (26) rising above a surface of the seal (17), radially connecting to the insertion opening (11), extends through the recess (13) outwards towards the front side of the flange plate (10), and thereby, the actuating element (8) is covered by the dome (26).

9. A seal (17) for an electrical plug connector for sealing against a device wall (G), comprising:

the seal having a central cutout (30) at a location of an insertion opening (2) of the electrical plug connector and through holes (20) at locations of mounting bores (12) for the electrical plug connector;

wherein a sealing lip (18) surrounding the central cutout (30) limits an inner circumference of the central cutout, and an edge (19) bent backwards and rising above a rear surface of the seal (17) is present on a rear side of the seal (17), on which edge (19) a circumferential sealing structure is arranged or which edge (19) itself forms the sealing structure; and

wherein sealing grommets (21) rising above a front surface of the seal (17) and having central feed-throughs (20) for a fastener (5) are arranged at locations for feeding through the fastener (5).

10. The seal according toclaim 9, wherein the sealing structure comprises a circumferential sealing ridge, wherein an outside of the circumferential edge (19) of the seal (17) is slanted outwardly.

11. The seal according toclaim 9, wherein the sealing structure is a circumferential sealing edge radially projecting outwards.

12. The seal according toclaim 9, wherein domes (22) rising above the front surface of the seal (17) and having central feed-throughs (23) for spacer pins (16) are arranged at locations for feeding through spacer pins (16).

13. The seal according toclaim 9, wherein a dome (26) rising above the front surface of the seal (17), radially connecting to the central cutout (30), is arranged and formed integrally with the seal (17).

14. The seal according toclaim 9, wherein a ridge (24) surrounding the central cutout (30) radially outside, rising above the front surface of the seal (17), is provided.

15. The seal according toclaim 9, wherein at least one radially protruding connecting strip (27) is integrally formed onto the seal (17), a pot-shaped sealing plug (28) is fastened to an outer end of the connecting strip (27), and an outer diameter of the pot-shaped sealing plug is slightly greater than an inner diameter of the sealing lip (18) of the central cutout (30).

16. The seal according toclaim 15, wherein a full-surface gripping lug (29), which has a pot-shaped design, protrudes on a side of the sealing plug (28) opposite the connecting strip (27).

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